Machine for covering rolls with leather.



J. J. CUNNINGHAM. MACHINE EOE COVERING ROLLS WITH LEATHER. APPLICATION FILED SEPT. 22, 1910.

1,013,749, v Patented Jan. 2, 12912.

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1,013,749., Patent ed Jan. 2, 1912.

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J. J. CUNNINGHAM. I MACHINE FOR COVERING ROLLS WITH LEATHER.

APPLICATION FILED SEPT. 22, 1910.

Patented J an. 2, 1912.

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COLUMBIA PLANOGRAPM CO.,WASHINGTON. D. C.

JOHN J. CUNNINGHAM, OF MANCHESTER, NEW HAMPSHIRE.

MACHINE FOR COVERING ROLLS WITH LEATHER.

Specification of Letters Patent.

Patented Jan. 2, 1912.

Application filed September 22, 1910. Serial No. 583,290.

To all whom it may concern:

Be it known that I, JOHN J. CUNNING- HAM, a citizen of the United States, residing at Manchester, in the county of Hillsboro and State of New Hampshire, have invented certain new and useful Improvements in a Machine for Covering Rolls with Leather; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 0

This invention relates to improvements in machines for covering the rolls of spinning wheels with leather.

One object of the invention is to provide a machine of this character having means whereby the strip of leather will be guided and evenly applied to the rolls thus obviating the necessity of trimming the rolls after the same are covered.

Another object is to provide means whereby the leather may be stretched around the rolls before being cut from the strips.

A further object is to provide a machine of this character which may be adjusted to cover rolls of different sizes and widths.

With these and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts as will be first fully described and then particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 is a front view of my improved roll covering machine showing the parts in operative position for covering a roll; Fig. 2 is a top plan view; Fig. 3 is a central transverse sectional view; Fig. 4 is an enlarged detail perspective view of one of the leather gripping and stretching arms; Fig. 5 is a bottom plan View of the guide supporting plate; Fig. 6 is a detail horizontal section on the line 66 of Fig. 1.

Referring more particularly to the drawings, 1 denotes the base plate of my improved roll covering machine, said base having secured thereto, adjacent its opposite ends, upwardly projecting hollow standards 3 and 4 said standards being offset at their upper ends or provided with offset upwardly projecting bearing extensions 5 in the up,- per ends of which are formed bearings 6 in which is revolubly mounted an operating shaft 7 hereinafter described. The offset,

as shown in Fig. 1, forms a support for the I strip of leather in its passage to the roll.

On the central portion of the base plate 1 between the standards 8 and 4 are formed lateral extensions 8 having arranged thereon guide tracks 9. On the guide tracks 9 are slidably mounted carriages 10 and 11 on which are arranged blocks 12 .provided with sockets 13 adapted to receive roll supporting posts 14 and 15. The posts 14 and 15 are adapted to be adjusted to the desired height for supporting rolls of different diameters by raising and lowering the same in the sockets 13 of the blocks 12 and they are held in their adjusted positions by means of latches 16 which are pivoted on the upper ends of the blocks 12 and are adapted to be swung into and out of engagement with 'aseries of transverse notches 17 formed in the posts. On the upper ends of the posts 14 and 15 are formed recessed bearing heads 18 adapted to receive the trunnions or the opposite ends of the spindle carrying the roll to be covered. The carriages 10 and 11 are adjustably connected by a right and left hand threaded adjusting bolt 19 the opposite ends of which engage with oppositely threaded sockets formed in the inner sides of the blocks 12. The bolt is provided between its ends with an annular wrench-receiving portion 20 and on the base plate 1 between the tracks 9 is arranged a stop plate 21 whereby the movement of the carriages 10 and 11 is limited. It will thus be seen that by manipulating the bolt 19, the carriages 10 and 11 will be caused to approach and recede from each other and the distance of said carriages from each other be adjusted to spindles of different lengths. Fitted on the post 14 is a supporting plate 22 said plate having formed therein an opening through which the post 14 extends and havends or shanks of brackets or guides 25' which are adapted to be adjusted into close engagement with the opposite sides of the roll supported on the posts 14 and 15 thereby keeping the leather even as it is stretched around the roll and preventing the edge of the same from projecting beyond the side of the roll so that it will not be necessary to trim the leather after the roll is covered. The outer end of the plate 22 is preferably supported on a bar 260 adjustably secured on an upright 26 arranged on the stop 21 of the base plate as shown.

Mounted in the ofisets of the standards 3 and 4 are pivots 27 from which short crank arms 28 project downwardly within the standards and to the lower ends of these crank arms are pivotally connected the inner ends of leather stretching levers 29. The outer end of each lever 29 has an integral downwardly projecting guide lug 30 at one side and an adjustable guide lug 31 at the opposite side, the lug 31 being fixed to the outer end of a leather gripping block 32 which has a dovetailed sliding connection with a dovetailed groove 33 formed in the end of the lever as shown. The gripping block 32 is secured in its adjusted position in the groove 33 by a set screw 34 arranged in the end of the lever as shown. The blocks 32 have formed on their outer surfaces a series of leather gripping teeth 35 adapted to be embedded in the leather and obtain a firm hold thereon when it is being stretched around a roll. By adjusting the blocks 32' in the grooves 33 the lugs 30 and 31 may be spaced different distances apart to accommodate strips of different widths. The blocks 32 are of greater length than the width or thickness of the outer ends of the levers and when the blocks are adjusted to bring the lugs 30 and 31close together the inner ends of the blocks will project through openings 36 formed in the integral or stationary lug 30 of the levers. When not engaged with a roll the levers 29 are supported by short coiled springs 37 which are connected at their opposite ends respectively to the levers and to lugs 38 formed on the hubs of the crank arms 28 as shown.

Fix edly mounted on the hubs of the crank arms 28 in the plane of the main shaft 7 are levers 39 which project upwardly and work in the hollow extensions 5 of the standards 3 and 4. On the upper ends of the levers 39 are formed segmental heads 40 having on their outer edges a series of worm teeth 41 which are operatively engaged with worms 42 fixed on the operating shaft 7 adjacent the upper ends of the standards as shown. In the outer ends of the heads 40 are revolubly mounted anti-friction rollers 42 which are adapted to engage stop plates 43 also secured to the shaft 7 at the ends of the worms 42 as shown. By thus arranging the stop plates 43 the levers will be stopped in their outward movement when the rolls 42 come into engagement with the stop plates. By means of the toothed heads 40 and the worms 42 engaging the same, the levers 39 will be actuated by the movement of the shaft 7 to rock the shafts 27 in one direction or the other thereby swinging the crank arms 28 inwardly or outwardly, the stretching levers 29 following the movement of the crank arms.as will be readily understood. Then the crank arms 28 move outwardly,

the stretching levers are carried away from the roll and the end of the leather strip may then be placed in position around the roll. On the reverse movement of the crank arms, the stretching levers will be swung toward the roll and the teeth on their ends will engage the leather so that the continued movement of the levers will stretch the leather tightly around the roll as will be readily understood on reference to Fig. 1. After the leather has been thus stretched, it is severed transversely at the point where its ends meet the main length of the same.

Loosely mounted on the shaft 7 are drive pulleys 44 by means of which suitable power is applied to the shafts. The outerends of the pulleys form members 45 of friction clutches the opposite members of which are in the form of disks 46 slidably keyed to the shaft 7 and provided with hubs 47 having annular grooves engaged by the upper bifurcated ends of clutch shifting levers 48 pivotally mounted in bearing brackets 49 projecting laterally from the outer sides of the standards 3 and 4. The lower ends of the shifting levers 48 are provided with suit able handles whereby they may be manipulated to throw the clutch members into or out of engagement according as the shaft is to be rotated or to remain at rest. The levers 48 are provided with retracting springs 51 arranged on the brackets 44 and engaging the inner sides of the levers whereby they are normally swung outwardly to a retracted position to hold the clutch members out of engagement. On one end of the shaft 7 is preferably arranged a fly wheel 52.

It will be noted that by ofisetting the upper ends of the standards to support the operating shaft and lever operating mechanism to one side of the main portion of the standards, a long strip of leather may be supported on the offset and guided to the roll to be covered without any twisting or distortion. I also overcome the necessity of cutting the leather into lengths before covering the roll and avoid the waste heretofore due to such operation, as no more of the leather is cut off than is actually needed for stretching around the roll- In the form of roll covering machines heretofore used, it is necessary to cut a piece .of leather from the strip of suflicient length to be stretched around the roll and it frequently happens that these pieces are longer than is necessary so that after being stretchedaround the roll there is a surplus which must be cut OE and forms waste, whereas in the use of my inn proved machine, the leather is stretched around the roll and then out OK to the exact length thereby avoiding waste.

In the use of my improved machine, the strips of leather are cut to the exact width of the rolls to be covered and the strip, when applied to the roll, is guided and held in position by the guide lugs 25 on the supporting plate 22 and by the guide lugs 30 and 31 on the stretching levers. By thus guiding the strip when the same is stretched around the roll the edges of the strip are kept flush with the outer surface of the rolls so that there is no necessity for subsequent tri1nming and the leather heretofore wasted in this manner, as well as the time and labor consumed in the operation, is saved. It will be readily understood that in adjusting the posts lat and 15 vertically, the ends of the same are moved to and from the upper limit of movement of the stretching levers and, consequently, the axis of the roll may be supported at any desired point according to the diameter of the roll. As it is necessary only that the guides 25 extend past the periphery of the roll, it will be seen at once that rolls of wide range of diameter may be accommodated without any change in the position of these guides relative to the base of the machine, but the range of usefulness of the machine may be increased by adjusting the plate 22 vertically upon the bracket 26. The longitudinal slot in said plate 22 permits the guides 25 to be adjusted to various widths of strips and by providing a number of said plates which may be interchanged, the machine may be used to cover rolls of greatly varying widths, the supporting posts 14: and 15 being adjusted to the width of the roll by properly manipulating the bolt or screw 19 as will be readily understood.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as defined in the appended claims.

Having thus described my invention, what I claim is:

1. In a roll covering machine, the combination of a'base plate, supporting standards arranged thereon, carriages slidably mounted on said plate and adjustable toward and from each other, roll supporting posts adljustably mounted in said carriages, a pair of leather guiding lugs adjustable toward and from each other adapted to engage the opposite sides of a roll supported by said posts, leather stretching levers, and means whereby said levers are operable to stretch a strip of leather around a roll.

2. In a roll covering machine, the combination of a base plate, a pair of standards arranged thereon and provided on their upper ends with offset bearing extensions,

an operating shaft revolubly mounted in said extension, carriages mounted on the base and adjustable toward and from each other, roll supporting posts adjustably mounted on said carriages, leather guiding lugs adjustably supported on one of said posts and adapted to engage the opposite sides of a roll supported on the posts thereby holding and guiding the leather applied to the roll, a pair of stretching levers having a djustable guide lugs and a leather-gripping member arranged on their outer ends, and means to operatively connect said levers to said operating shaft whereby the levers are actuated to stretch the leather around the roll.

8. In a roll covering machine, the combination of a base plate, a pair of standards arranged thereon, roll supporting carriages slidably mounted on the base plate, means to adjust the carriages to support rolls of dif' ferent widths, a pair of roll supporting posts adjustably mounted on the carriages to support rolls of different diameters, means to secure the posts in their adjusted positions, a pair of stretching levers, each having on one side of its outer end a fixed guide lug, a toothed gripping block having a sliding engagement with the outer end of the lever, an adjustable guide lug secured to one end of the block and adapted to co-act with the rigid guide lug on the opposite side of the lever whereby a strip of leather is guided when applied to the roll, means to hold the block and adjustable lug in their adjusted positions, and an operating mechanism connected with said levers but in a different plane, whereby the levers are actuated to stretch a strip of leather around a roll without cutting the leather before the same is stretched.

4. In a machine for covering rolls, the

combination of a base plate, supporting standards secured thereto, roll supporting carriages comprising blocks mounted on the base plate having operatively threaded sockets on their inner sides, an adjusting bolt having its opposite ends engaged by said sockets whereby the carriages are adjusted to accommodate rolls of different lengths, roll supporting posts having a sliding engagement with the blocks and having a series of notches, latches pivotally mounted on the blocks and adapted to engage the notches whereby the bolts are supported at different elevations, a slotted guide supporting plate adjustably mounted on one of the posts, a latch pivoted on the supporting plate and adapted to engage the notches in the post whereby the plate is adjustably secured on the post, guide lugs adjustably mounted in the slot of the supporting plate, a stop arranged on the base plate to limit the movement of the carriages, an adjustable upright arranged on the stop to support the outer end of the supporting plate, a pair of leather stretching levers, and means arranged on the standards to operatively engage the levers with the leather whereby the latter is stretched around the roll.

5. In a roll covering machine, the combination of a base plate, a pair of supporting standards arranged on said plate, said standards having offset bearing extensions on their upper ends, an operating shaft revolubly mounted in said extensions, an adjustable roll supporting mechanism arranged on said base plate, pivot shafts arranged in said standards, crank arms on said shafts, leather gripping and stretching levers operatively connected to the ends of said crank arms and adapted to engage the leather and stretch the same around the rolls, crank operating levers connected to the hubs of said crank arms, said levers being offset from the arms and adapted to Work in the offset extensions of the standards, toothed segmental heads formed on the upper ends of said levers, worms fixedly mounted on said operating shaft and adapted to engage the teeth on said heads whereby when the shaft is revolved in the proper direction said levers and crank arms will be actuated to engage the stretching levers with the leather to stretch the latter around the roll, and means whereby said operating shaft is driven.

6. In a machine for covering rolls with leather, a base plate, a pair of supporting standards arranged on said plate, said standards having oifset bearing extensions arranged on their upper ends, an operating shaft revolubly mounted in said extensions, an adjustable roll supporting mechanism arranged on said base plate, pivot shafts ar ranged in said standards, a crank arm pivotally mounted on said shafts, leather gripping and stretching levers operatively connectedto the ends of said crank arms and adapted to engage the leather and stretch the same around the rolls, crank operating levers connected to the hubs of said crank arms, said levers being oifset from the arms and adapted to work in the ofiset exten- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

sions of the standards, toothed segmental heads formed on the upper ends of said levers, worms fixedly mounted on said operating shaft and adapted to engage the teeth on said heads whereby when the shaft is revolved in the proper direction said levers and crank arms will be actuated to engage the stretching levers with the leather to stretch the latter around the roll, stop plates fixed on said shaft and extending into the path of the heads whereby to limit the movement of the same, and means for rotating the shaft.

'7. The combination of a base plate, a pair of standards erected on the base plate and having ofiset upper ends presenting supports for roll covering material, a roll supporting mechanism on the base plate be tween the lower portions of the standards, stretching levers mounted upon the standards at the offsets thereon in the plane of the lower portion thereof, and operating mechanism mounted in the upper offset ends of the standards and connected with the stretching levers to actuate the same.

8. In a machine for the purpose set forth, a stretching lever having a guide lug on one side at its end, a laterally adjustable strip engaging block on the end of the lever, and a guide lug on one end of said block coacting with the lug on the lever.

O. The combination of a base plate, a pair of standards thereon, carriages mounted on the base plate, roll supporting posts mounted on said carriages, a stop plate between the posts, a supporting plate secured upon one of the posts and said stop plate, guides adjustably secured in said supporting plate, stretching levers mounted on the standards, and means carried by the standards for actuating said levers.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN J. CUNNINGHAM.

IVit-nesses EDWARD G. SMITH, BENJAMIN IV. HALL.

Washington, D. C. 

